Woven lace fabric.



No. 764,208. PATENTED JULY 5, 1904. A. RONSDORF.

WOVEN LACE FABRIC.

APPLICATION FILED JUNE 16, 1902. NO MODEL.

% Zuenl'of 4 '2.

Patented July 5, 1904.

UNITED STATES PATENT OFFICE.

AUGUST RONSDORF, OF AMSTERDAM, NETHERLANDS, ASSIGNOR TO JAN HERMAN VAN EEGHEN AND ISAAK DA COSTA, OF AMSTER- DAM, NETHERLANDS.

WOVEN LACE FABRIC.

SPECIFICATION forming part of Letters Patent No. 764,208, dated July 5, 1904.

Application filed June 16, 1902. Serial No. 112,014. (No specimens.)

To all whom it may concern.-

Be it known that I, AUGUST RONSDORF, a subject of the Emperor of Germany, residing at Amsterdam, in the Kingdom of Netherlands, have invented a new and useful Improvement in WVoven Lace Fabrics, of which the following is a specification.

My invention has for its object the production of lace fabrics on looms in imitation of hand-made lace, and particularly of such laces having arc shaped bottom portions. The method of making such laces comprising a more or less broad border, a partly-open, partlyclosed woven middle portion, and an arc-shaped bottom part consists in the following: In order to make the border or upper portion of the lace, the warp-threads, which are governed by heddles, are bound more or less dense by the picks of weft, while for the formation of the middle portion or pattern groups of warpthreads are arranged which, being carried in other heddles, are put closely together or drawn asunder, so that there are formed striped patterns changing With'spots or the like objects. For making the arc-border the weft-threads are carried over a number of warp-threads, which being raised and lowered allow loops to be made, said warp-threads being removed afterward.

My invention may be more clearly understood by means of the accompanying drawing, which shows the fabric produced by my method on an enlarged scale.

The portion marked by the reference-letter E represents theborder of the fabric, which is of usual and known construction. By the reference-letter D is marked the middle portion. It consists of a number of Warp-threads which are arranged in groups, as shown, and which may be at will drawn asunder or closely put together, so that aspot or the like may appear in the fabric, as shown. The border is formed by the weft-thread, which returns over more or less warp-threads, so that loops are formed by the weft andthe border is shaped in arc form.

The pattern-forming threads I II 111 IV of the border E, lying in groups, are bound, for

instance, by the pick of weft s, which, passing first the threads I of the group E, then passes the threads II, binding them thrice and also binding in the same way the threads III and IV. In the same manner the weft-thread s crosses the groups 0 cl 6 f g of the warp-threads D, forming then a long loop h, for which purpose it passes a number of warp-threads z', that have been not raised. After returning over the last of these threads vi the same are raised,

so that the loop h is made. Now the weft 8 runs in the same manner back to the threads I, and so on to and fro, forming with the threads E the upper border, with threads D the pattern, and by means of threads 2' the arc. The pattern is formed, as before described, by adjusting the groups 0 d e f g with decreasing are, which takes place by employing a smaller number of threads z'. The groups of D are gradually closely put together, thus forming a spot or like object.

In order to allow the weft to be laid in the fabric as described, the shuttle is 'driven in the usual manner by a pinion and a rack, and the latter is connected in any suitable manner to the jacquard-machine, which, according to the pattern, controls the movement of the shuttle by the jacquard-cards, so that the shuttle is driven a more or less long way through the fabric. Instead of a jacquardmachine there may be with the same effect other means used for reciprocating the shuttle to lay the weft.

What I claim, and desire to secure by Letters Patent, is-

As an article of manufacture a lace fabric, having a border formed of groups of warpthreads arranged in straight lines, a group of warp-threads being partly arranged in straight lines and partly drawn together and laid in curved lines, the last group of these threads forming the other border and a weft-binding, said weft being arranged-in loops of different length as shown and described.

AUGUST RONSDORF.

Witnesses:

AUGUST SIEGERIED DOOEN, PAUL STAAL. 

